muscle750

Yesterday for no reason upon starting the idling started running very erracticly, i immediately stopped the engine restarted it ran fine. Today i drove car for 12 miles with no issues, then coming back home it started again running very rough with erractic idling. I called out the breakdown who discovered that the intercooler pipe had collapsed and starving the engine of air etc. He removed the pipe and the engine ran fine managed to limp it back another 9 miles with the pipe disconnected obviously down on power but as soon as you put pipe back on it collapses and runs bad. Almost as if somethings blocked etc. I dont understand why it did what it did yesterday and then ran fine for 12 miles plus then decided to throw a wobble. Any suggestions?